It's a double fatal with a man and a woman dead, and another woman in critical condition in this quadruple shooting on Detroit's east side. No motive known.

Detroit police said two people are dead and two hurt after a walk-up shooting Tuesday on the east side.

A 21-year-old man and a 13-year-old girl sitting in a parked Dodge Challenger were fatally shot, police said. A 7-year-old boy and 13-year-old girl, who were not in the vehicle, were injured when the driver sped off trying to evade shots fired by two gunmen who approached on foot with handguns, Detroit police said.

Police said the injured boy is listed in temporary serious condition and the injured girl is listed in critical condition.

The speeding car came to rest against a building, and the suspects were still at large in the shooting that began at around 4 p.m. in the area of Hayes and Seymour -- three blocks west of Denby High School and a mile west of the Moross exit on I-94, police said.

Investigators so far have no details on a possible motive for the apparent homicide, said Sgt. Cassandra Lewis, who was at the scene.